Mercedes-Benz E-Class Owner's Bible (1986-1995), Update

Chapter 3 - Maintenance

Polyribbed belt replacing, pages 97-102

M103 engine

• Loosen fan shroud from its mounting points and place it back up on fan.
• Lock main fan pulley by inserting special tool 103 589 00 40 00 into hole in hub (arrow).

• Using special tools 103 589 01 09 00 and 001 589 72 21 00, remove hex socket screw in center of fan hub and remove viscous fan / clutch assembly along with shroud.

• Loosen clamping bolt (arrow) at least ½ turn.

- Using tension adjusting screw (arrow), release tension on belt tensioning device. This will free up belt.

• Remove belt.
• Check all pulleys for damage. Check belt tensioning device for play. Replace if required.
• Using tension adjusting screw, move belt tensioner indicator (A) to left-most mark (as viewed from driver seat). B is clamping bolt.

• Install new belt as shown in diagram.

- Using tension adjusting screw, adjust tension pointer so it is at 7th mark on indexed tensioner (arrow) or left-most mark on non-indexed tensioner. Tighten clamping bolt.

Tightening torque
Belt tensioner clamping bolt.........75 Nm (55 ft-lb)

• Check belt routing to make sure it is correct.
• Reinstall viscous fan clutch and fan shroud.
• Using counterholding tool 103 589 00 40 00, tighten viscous fan to fan hub.

Tightening torque
Viscous fan to fan hub.........45 Nm (33 ft-lb)

M104 engine

• Fan shroud for M104 engine is two-piece unit. To remove rear portion for belt changing, remove pin (A) and rotate rear section (B) to left to remove.

• Loosen clamping screw (A) ½ turn.

• Loosen tension adjuster (arrow) until belt can be removed.

• Check all pulleys for damage. Check belt tensioning device for play and replace if required.

• Install new belt as shown in diagram.

• Using tensioning adjustment screw, move pointer on belt tensioner to left-most position (A) as viewed from driver's seat. Turning tensioner clockwise, tighten until pointer aligns with right most-mark (B).

• Check seating of belt in all pulleys.

• Tighten clamping bolt.

Tightening torque
Belt tensioner clamping bolt..........75 Nm (55 ft-lb

• Install fan shroud in reverse order of removal.

M119 engine

• 400E and 500E fan shroud is a two piece unit consisting of upper and lower shrouds. Remove upper shroud.

• Loosen clamping bolt (A) and loosen tensioning screw (B) in a counterclockwise direction until tensioner is loose enough to remove belt.

• Check all pulleys for damage. Check belt tensioning device for play and replace if required.

• Install new belt as shown in diagram.

• Using tensioning screw, adjust belt tensioner pointer so it is pointing to right-most mark (top in picture, side view of belt tensioner).

• Turn tensioning screw clockwise until pointer is in center position.

• Check seating of belt in all pulleys.

• Tighten clamping bolt.

Tightening torque
Belt tensioner clamping bolt..........100 Nm (74 ft-lb)

• Install fan shroud in reverse order of removal.

Mercedes-Benz E-Class (W124) Owner's Bible™: 1986-1995